My understanding is that most civilian satellite imagery is pretty low resolution. The aerial imagery used on most maps sites is taken from planes -- there's clear parallax in some areas of the image, and far too much perspective in general to be taken from an orbital platform.
The layers here are satellite imagery. Mapping sites definitely bring in any other sources that make sense though.
I haven't looked at it a great deal, the "Premium" layer appears to be more carefully produced with the "Standard" layer favoring fresher imagery. So both are nice resources.
My understanding is that most civilian satellite imagery is pretty low resolution. The aerial imagery used on most maps sites is taken from planes -- there's clear parallax in some areas of the image, and far too much perspective in general to be taken from an orbital platform.